Well, I think the readers will get a laugh out of it, and it just seems like a fun SCP to make. The jar is infinite because an old witch in Belgium cast a spell on it that makes it infinite. Other unusual properties include making people extra happy and can cure crippling depression. But if you eat more than 5 tablespoons of it then you will get addicted to it and won’t be able to stop eating it.

Well, the old witch didn’t actually make the jar infinite, but she created a spell that can make things infinite and then many years later, a group of explorers found it and used it on a jar of Nutella our see if it worked.

One of the explorers bet his partner that it would work, and since if it did work they would get infinite Nutella, they chose to experiment on a jar of Nutella. The explorer also thought that he could use the spell on other objects so he could sell them and be infinitely rich.

We've already got a tree that replicates things. It's different from this because it's not a generic "multiplies everything, no strings attached" object. The tree creates copies that are less effective.

The explorer also thought that he could use the spell on other objects so he could sell them and be infinitely rich.

I personally don't think this idea is worth pursuing currently, since you seem to be continuously making the backstory more and more complicated without really making it any more realistic or engaging.

An that’s where the foundation comes in! They sell the knockoff Nutella to other people and they start getting hooked on it. So the police find out it’s counterfeit and arrest the explorers. Then they give the jar to the SCP Foundation.

You don't need a draft in SCP article format to compile thoughts. Just give us a quick overview, as everyone in this forum is expected to do.

However, given the current discussion in the thread, it looks like you've effectively been ignoring reviewer concerns about how workable your idea actually is. This sort of behavior makes readers less likely to want to attempt to help an author.

In 1736, an old witch from Belgium created a magical formula that when poured into a container filled with an object, will make the container never run out. The witch created the formula, but soon after was hanged by local townspeople under the suspicion that she was a witch. The witches’ daughter saves the potion and it is passed down over the generations but is never used. 206 years go by and the Nazi’s have invaded Belgium. A group of German soldiers accompanied by an SS officer storm the family of the witches’ house and find the potion. The officer finds out it’s a potion and gives it to his’ commanders and they give it to scientists working in Berlin who plan experiment with it. By this point, the year is 1945. Two days before the tests are going to take place, the Allied Powers storm Berlin. Fortunately, the O.S.S. seizes it from the Nazi lab, and takes it back to the U.S. where is stays in the Government’s control until 1964, when it is stolen along with a few other relics by a master cat burglar. The Government finds out so the burglar tries to hide the evidence, but dosen’t have enough time, While hiding the evidence, he pours the potion into a nearby Nutella container, but he was caught and detained. When the Government searches his house, they find the jar. They think nothing of it at first, until one of the officers looks inside for possible stolen items. Then they find out it’s infinite. The Foundation discovers it’s existence and takes it. They run tests and find out that it is also highly toxic Because the potion was so old when it was used, it became tainted.

That is actually a minimization of the original saying, which is "perhaps a story about a jar of nutella does not need witches, the fucking Nazi Party of all goddamned things, and a burglary subplot". I think that original saying has a great degree of wisdom of this situation.